Louis stirn



(No Model.) v

L; STIRN. SOCKET FOR INCANDESGENT LAMPS.

No. 515,484. l Patented Feb. 27, 1894.

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UNITED STATES PATENT OEEicE.

LOUIS'STIRN, OF NEW YORK, N. Y., ASSIGNOR` OF TWO-THIRDS TO .lULIUSSOMBORN, OF SAME PLACE.

SOCKET FOR INGANDESCENT LAMPS.

SPEGIFICATIGN forming' part of Letters Patent NO. 515,484, datedFebruary 27, 1 894.

Application iiled June 22,1892. SerialliloAS'lS. (No model.)

To a/ZZ whom it may concern.-

v Be it known that l, LOUIS STIRN, a citizen of the United States, and aresident of New York city, in the county and State of New York, haveinvented certain new and useful Improvements in Sockets for IncandescentElectric Lamps, of which the following is a specification.

This invention relates to that class of ro sockets for incandescentlamps in which a switch is arranged for controlling the current. Theobject of my invention is to provide a socket of this kind which has aswitch that is so arranged as to alternately throw thev lamp in or outof circuit, so that the lamp can easily be lighted or extinguished byslightly pulling a cord or chain connected with said switch. -f

The invention consists of a socket for in- 2o candescent lampscontaininga shaft provided with a ratchet-wheel and carrying a swingingspring-actuated pawl-lever with which-a suitable chain or cord isconnected, and acheckpawl engages the ratchet-wheel. On said z5 shaft ablock of insulating material is liked, which acts on the contact-springand either holds the same in contact with the contactpicce of the lampor permits the same to be out of contact.

The invention also consists in the construction and combination of partsand details which will be fully described hereinafter and finallypointed out in the claims.

In the accompanying drawings, Figure 1 is 3 5 a side-view of anincandescent electric-lamp provided with my improved socket. Fig. 2 isan enlarged longitudinal sectional-view through the socket. Figs. 3 and4 are transverse-sectional views of the socket containingthe'contact-spring in different positions. Fig. 5 is an enlarged detailside-view of the switch-lever and ratchet-wheel. Fig. 6 is a plan-view.Fig. 7 is a detail-view of the switch-lever, showing a modifiedarrangement.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the incandescent electric-lampand B the socket 5o of the same, which socket may be made of any wellknown construction. In Vthe sidewalls of the socket the shaft O isjournaled yon which is fixed a ratchet-wheel D having four teetharranged a quarter of a circle from' each other. The spring check-pawl E5 5 is fixed to the top or bottom of the socket, as may he desired, andengages said ratchetwheel 'for the purpose of locking the same in placeafter each quarter turn. On said shaft C a pawl-lever F is mounted toswing, 6o said pawl-lever having an aperture F which is slightlyelongated, that is, its lengthis greater than the diameter of the shaft,so as to give said pawl-lever a certain play on the shaft. Thepawl-lever F is provided at its lower end with a laterally-projectinglug or ange g, the upper end of which is adapted to engage the teeth ofthe ratchet-wheel D.

A helical `spring H is wound on the shaft C and has one end fastened tothe side oi' the 7o socket and the other fastened to the lower end ofthe pawl-lever F, so as to' throw said pawllever downward, that is, tohold the end provided with the liange G in the lower position. To theopposite end of the pawl-lever F a cord or chain K is fastened whichpasses through a suitable aperture L in the socket and extends downwardand is provided atits lower end with a loop or handle. In the socket thecontact-spring M is fastened, the 8o free end of which can bear on thecontactpiece N of the incandescent electric lamp, and when released,snaps from said contact-piece,

as shown in Fig. 4.

On the shaft O a transverse block O of insnlating material is fastened,which when in horizontal position acts on the spring M in such a manneras to press the lower end of the same against the contact-piece N of theg lamp, and when in vertical position permits 9o said spring to snapfrom the contact-piece.

In Figs. l to v7 the socket is shown as applied ou a lamp, the bulb ofwhich is below the socket, but in case the bulb is arranged above thesocket, the sameswitch can be used and it is only necessary to pass thecord K over the pulley P in the top-plate of the socket and thendownward.

The operation is as followsz-For example, as shown in Fig. 3 the circuitis closed as the too transverse-piece O bears on the spring M and keepsthesarnein contact with thecontact-` piece N of the lamp. .IE the cordKiiisncw` pulled downward the lever F gives the shaft C a quarter turnand the block O is brought into vertical position, as shown iu Fig. 4,permitverse position, as shown indig, and presses the spring M incontact with the contact-piece N. It will be observed that, theleverF-is not provided with a special pawl engaging the ratchet-,wheel D, buth asa laterally-proj ecting lug or` flange which acts -asa pawl. AsthespringI'If is brought into tension by pulling down on4 the cord` K andvswings the` lever F downward, the lever F must slide to the left, asthe teeth of the ratchet-wheel E are cam.- shaped and the distancefrointhe edge of the same to the centerof the shaft Ogradual-ly increasestoward `tlierendiof the tooth. This compelsthe lever Fwhileswinging downward unl der theaction` ci thespring to move slightlyto the left until the upper edge of the flange G- arrives yat the end ofthe tooth, whereupon the springll throws the leverF to the rightslightly, so that the upperedge of the flange- Gr rests against thebeginning of the next tooth. The elongated opening F. of the lever F`permits of. such movements of the lever. The switch is retained entirelyWithin the socket and no parts of the same project from the socket andare thus not apt to be clogged by dust and present a much handsomerappearance than the switches havingproject- 4o ing parts. l

Havingethus describedwmy.invention, I claim as new and desire to secureby Letters Patent-v 1. The combination, with a socket providedwthanietrical consumer-,.oteshaft unfall-nt-V edi` in thesides of saidsocket, a block fixed on said shaft and adapted to act on the electricalconductor, a pawl-lever mounted loosely opening, through which the shaftpasses, a helical spring surrounding said shaft and having one end fixedinsaid-socketand the other end to the pawlelever, a projection on saidlever serving as a pawl, a ratchet-wheel xed on the shaft, the teeth ofwhich are engaged y by said projection, acheck-pawl-engagingtheratchet-wheel and a cordl attached to said lever and passing thrcunghvanopening in the socket, substantially as set forth.

2. The. combination, with a socket containing an electrical conductor,of a shaft in said socket, a block tixed on said shaft and adapted toact on the conductor, a ratchet-Wheel on the shaft, a rocking pawl-levermounted on the shaft and engaging the ratchet-wheel, a cord secured tothe pawlflever, a pulleyon the socket over which the cord passes, saidcord also` passing-.through an opening in the socket, substantially asset forth.

In testimony that I claim the foregoing as myinvention I have signedIn-y nameriu presenceof two subscribing witnesses.

Louis sTiRgN.

-on theshaft andfpnovided with an elongated 5o

